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  • Laser Grade TeO2 Crystals
  • Laser Grade TeO2 Crystals

Laser Grade TeO2 Crystals

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Modules or Types:

Hangzhou Shalom EO provide TeO2 crystals in following types:

  1. 2”, 3” and 4” TeO2 crystals boules or ingot with inspection polishing
  2. TeO2 crystals blanks
  3. Laser grade polished and coated TeO2 crystals


Basic Properties:

Crystal Structure Tetragonal Point Group 422
Lattice Parameter (nm) a 0.4810
c 0.7613
Density 5.99 g/cm3
Melting Point 730°C Mohs Hardness 4.5
Transparency Range (nm) 350 ~ 500 Gradient of Refractive Index ≤ 5
Refractive Index no = 2.260
n3 = 2.142
Transmittivity 70%@632.8nm
Phase Velocity (m/s) 616 Photo-elastic Coefficient P11=0.074 P13=0.34
P31=0.091 P33=0.240
Figure of Merit ( 10-18S3)/g M2 793

TeO2 (Tellurium Dioxide) is an excellent acousto-optic (AO) crystal with high AO figure of merit, birefringence, good optical rotation and slow propagation velocity along [110] direction. The resolution of AO devices made of TeO2 crystals will increase several levels than others. It is an ideal crystals for applications of AOM (acousto-optic modulators), AOD (acousto-optic deflectors), AOTF (acousto-optic tunable filters), laser Q-switches and RF spectrum analyzers ect. TeO2 crystals can be used in the field of astronomy, laser publishing, laser recorder and so on. 
High figure of merit(M2=793 ×10-18S3/g) 
High refractive index (2.2-2.4) 
High optical activity (20-500deg./mm)


  1. AOM (acousto-optic modulators)
  2. AOD (acousto-optic deflectors)
  3. AOTF (acousto-optic tunable filters)
  4. Laser Q-switches
  5. RF spectrum analyzers

Acousto-optic modulator (AOM) is applied in production of  Q switching in solid-state laser, cavity dumping of solid-state laser, pulse picker ,laser printer and other devices. Acousto-optic deflector(AOD) is applied in production of scanner, laser tweezer, RGB systems for laser projectors, laser scanning microscopy and profilometry. Acousto-optic filter(AOTF)  is applied in production of Rapid-scan Spectrometer, Multispectral Imaging, Fiber Optic Communication,  Spectropolarimeter and fluorescence spectrometer.